Here are some resources that are useful to small and medium enterprises.

Cyber Essentials Scheme
IASME Scheme
DLA Piper
Cyber Security Information Sharing Partnership (CiSP)
UK Cyber Security Forum
Information Commissioner’s Office (ICO)
ICO – Data Protection Act 2018
ICO Blog
ICO – Beyond 2018 – data protection laws built to last
Introduction to the Cyber Assessment Framework
Cyber Security & Data Directorate: EU Exit update - March 2019